Open Source Real-Time Collaborative Text Editor

Etherpad is a real-time web-based collaborative text editor that is open source and highly customizable.

Etherpad allows you to edit documents collaboratively in real-time, much like a live multi-player editor that runs in your browser. Write articles, press releases, to-do lists, etc., together with your friends, fellow students or colleagues, all working on the same document at the same time.

All instances provide access to all data through a well-documented API and support import/export to many major data exchange formats.